Kunnathu Sri Mahadeva temple is located near Kudappanakunnu civil station in Thiruvananthapuram district, Kerala. The temple is dedicated to Shiva and it is believed that the temple is one among the 108 Shiva temples in Kerala.
The Shivling worshipped in the temple is swayambhu and darshanam is towards east.
Legend has it that two Siddhas had sat here on meditation and they attained Samadhi in the spot where the current temple is located. They turned into an anthill and later a swayambhu shivling appeared in the place of the anthill.
The Upa Devatas worshipped in the temple are Ganapathy and Vasuki. The main festival in the temple is held on the Krishna Paksha Chaturdashi day in Dhanu month. Another important festival in the temple is Shivratri
The temple is located atop a small granite hill amidst 3 acre forest. It is said that earlier the temple was surrounded by a 7 acre forest.
The temple is belonged to Kunnathu Madom. The temple also had a connected with Kizhakevila Vettukar.